<?php

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/8/23
 * Time: 10:41
 */
class 防盗链代码
{

}
/**
 * http://blog.qita.in
 */
$ADMIN = array(
    'defaulturl'=> 'http://blog.qita.in/images/banner-header.gif',  //盗链返回的地址
    'url_1'     => 'http://blog.qita.in/file',
    'url_2'     => 'http://blog.qita.in/file1',
);
$okaysites = array(
    'http://qita.in',
    'http://blog.qita.in',  //白名单
    'http://blog.qita.in/1.html',
);
$reffer = $_SERVER['HTTP_REFERER'];
if ($reffer) {
    $yes = 0;
    while (list($domain, $subarray) = each($okaysites)) {
        if (ereg($subarray, "$reffer")) {
            $yes = 1;
        }
    }
    $theu = 'url_' . $_GET['site'];
    $file = $_GET['file'];
    if ($ADMIN[$theu] and $yes == 1) {
        header("Location: $ADMIN[$theu]/$file");
    } else {
        header("Location: $ADMIN[defaulturl]");
    }
} else {
    header("Location: $ADMIN[defaulturl]");
}
print_r($_SERVER['HTTP_REFERER']);